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Old 10-04-2015, 08:09 PM   #15
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I agree Lew. My system is about 10 years old.....I tried Blue Sky and didn't like the performance....then I tried the other and liked it.

Anyone can do a simple Google search on "blue sky or morning star mppt" and read all the threads out there. I'm not going to requote what anyone can read. I think folks should do there own fact finding and choose from what they want or can afford.
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Old 10-04-2015, 08:13 PM   #16
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I had a string of disappointing Blue Sky failures.... Jumped ship after being stranded.
Been using morningstar for a while with 0 issues or failures. Much happier with performance and zero failures!
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Old 10-05-2015, 10:57 AM   #17
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Thanks

Thanks,
At this point I have the controller, and am looking for understanding so in the future I can appropriately size both panels and controllers.

-Dwight
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Old 10-05-2015, 10:45 PM   #18
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Lew, did you find that spec?
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Old 10-05-2015, 11:38 PM   #19
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Originally Posted by morgandc View Post
Lew, did you find that spec?
The manual says a maximum of 340 watts of 36 cell panels at STC. IIRC, you have 32 cell panels (AM Solar's GS-100) and their recommendation is 400 watts max. I have used 480 watts (3-GO-160 watt panels) into the 2512iX-HV with no issues.

The manual also states that you should calculate a derating factor of 1.25 for NOC (normal operating conditions) which would bring a 425 watt array right to the recommended 340 watts.

Also remember that while Blue Sky doesn't like over capacity at the input of the controllers, they WILL accept it and simply clip the output amperage to the batteries at 25 amps. A typical solar array will only be producing maximum output for a short period as the sun's azimuth changes with regard to the panels' surface........... unless you employ an automatic solar tracking device that always points your array towards the sun at the optimum angle for maximum solar radiance.
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Old 10-06-2015, 06:32 AM   #20
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Thanks. Part of me says that I want to know what is max safe watts while "clipping", the other part of me says why....controllers are not expensive, size it right and use every ray of sun on a limited footprint install.

Thanks for the input as always, and I am still loving my crazy over done solar install. Nothing like being able to run my microwave off solar whenever I want. Now if my batteries would quit living forever so I can get some lithiums. Of course, at only 3 years on the AGM batteries I expect quite a few more years, and I am not looking forward to getting them out from under that dinette seat on my sport.

-Dwight
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Old 10-07-2015, 04:32 PM   #21
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No worries. They sure were not easy to install, but they WILL come out!!


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Master Tech Energy Systems, Inc.
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